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Dorman 986-684 Drive Shaft - Rear
Dorman 986-684 Rear Drive Shaft
Dorman 986-684 is a complete rear drive shaft assembly for select Chevrolet C20, Chevrolet C30, GMC C2500, and GMC C3500 applications. It arrives pre-balanced and ready to install with new yokes, steel tubing, constant velocity components, and universal joints for a direct replacement approach.
Key Features
- Complete drive shaft assembly for rear-position applications
- Pre-balanced for installation consistency
- 100% new yokes, tubes, CV joints, and universal joints
- Steel shaft construction with 3-inch shaft diameter
- Pre-greased with grease fitting included
- Slip yoke included; overall length adjustable
- Phased at 0 degrees
- Standard replacement grade
Detailed Description
This Dorman drive shaft assembly is built for rear driveline service on 1975-1986 Chevrolet C20 and Chevrolet C30, plus 1979-1986 GMC C2500 and GMC C3500 applications. It measures 71 inches collapsed flange face to flange face, with a 72.5-inch drive shaft length and 0.083-inch wall thickness. The assembly uses universal joints at both ends, includes a slip yoke, and is configured as a multi-piece shaft with no CV joints included. Part number 986-684 is also referenced for interchange with 7815487 and 7834052.
For buyers searching for a rear drive shaft for Chevrolet C20, Chevrolet C30, GMC C2500, or GMC C3500, Dorman 986-684 provides a direct replacement option built around the original driveline layout. It is a steel, pre-greased assembly intended for standard replacement service where a complete shaft swap is preferred over rebuilding individual driveline components.
What It Helps Address
- Driveline vibration from a worn or out-of-balance shaft
- Clunking or driveline noise from worn universal joints
- Excess play from damaged yokes or slip components
- Service issues caused by corrosion or tube wear
- Replacement needs after shaft damage or failure
Installation Notes
Verify rear application, wheel configuration, and measured length before installation. This assembly is pre-balanced, but driveline angles, flange condition, and mounting surfaces should be checked during service. Confirm the vehicle uses the listed rear fitment before ordering. Fits 1975-1986 Chevrolet C20, rear; Fits 1975-1986 Chevrolet C30, rear; Fits 1979-1986 GMC C2500, rear; Fits 1979-1986 GMC C3500, rear with Single Rear Wheel (SRW).
Quality Assurance
Dorman supplies this as a standard replacement drive shaft assembly with new major driveline components and pre-balanced construction for consistent service installation.
| Brand | Dorman |
| Part Number | 986-684 |
| Compressed Length | 71 |
| 10920 | Oui |
| 10920 | Sí |
| 10920 | Yes |
| End 1 Type | Unión universal |
| End 1 Type | Universal joint |
| End 2 Type | Unión universal |
| End 2 Type | Universal joint |
| Shaft Material | Acero |
| Shaft Material | Steel |
| Pre-Greased | Oui |
| Pre-Greased | Sí |
| Pre-Greased | Yes |
| Grease Fitting Included | Oui |
| Grease Fitting Included | Sí |
| Grease Fitting Included | Yes |
| Universal Joints Included | Oui |
| Universal Joints Included | Sí |
| Universal Joints Included | Yes |
| CV Joints Included | No |
| CV Joints Included | Non |
| Axle Nut Included | No |
| Axle Nut Included | Non |
| Grade Type | Reemplazo estándar |
| Grade Type | Standard replacement |
| Shaft Diameter | 3 |
| Slip Yoke | Oui |
| Slip Yoke | Sí |
| Slip Yoke | Yes |
| Max Slip | 3.125 |
This part fits 40 vehicles. Search below:
| Year | Make | Model | Body Type | Bed Length | Drive Type | Transmission | Wheel Base | Position | Notes |
|---|---|---|---|---|---|---|---|---|---|
| 1986 | Chevrolet | C20 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1986 | Chevrolet | C30 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1986 | GMC | C2500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1986 | GMC | C3500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1985 | Chevrolet | C20 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1985 | Chevrolet | C30 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1985 | GMC | C2500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1985 | GMC | C3500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1984 | Chevrolet | C20 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1984 | Chevrolet | C30 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1984 | GMC | C2500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1984 | GMC | C3500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1983 | Chevrolet | C20 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1983 | Chevrolet | C30 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1983 | GMC | C2500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1983 | GMC | C3500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1982 | Chevrolet | C20 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1982 | Chevrolet | C30 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1982 | GMC | C2500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1982 | GMC | C3500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1981 | Chevrolet | C20 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1981 | Chevrolet | C30 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1981 | GMC | C2500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1981 | GMC | C3500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1980 | Chevrolet | C20 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1980 | Chevrolet | C30 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1980 | GMC | C2500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1980 | GMC | C3500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1979 | Chevrolet | C20 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1979 | Chevrolet | C30 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1979 | GMC | C2500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1979 | GMC | C3500 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1978 | Chevrolet | C20 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1978 | Chevrolet | C30 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1977 | Chevrolet | C20 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1977 | Chevrolet | C30 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1976 | Chevrolet | C20 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1976 | Chevrolet | C30 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
| 1975 | Chevrolet | C20 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | |
| 1975 | Chevrolet | C30 | Standard Cab Pickup | 8' 0" Foot Bed | RWD | Automatic | 131.5" | Rear | w/Single Rear Wheel (SRW) |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.